Temperature-alarm apparatus.



R, SHELBY TEMPERATURE ALARM @PARA-'Fu APPLICATION FILED Ff i SHEETS-SHEET l.

wijk/momo H. R. SHREEY. TEMPERATURE ALARM APPARATUS.

APPLIGMTION4 FILED FBB,10,1913.

1, l 0,5, menten sgpt. 15, 1914.

2 SHEETS-SHEET 2.

New? F?? 5km' ley atto-WWA;

I St. Paul, in the county of Ramsey and Stute {ful improvements in Temperature-l ierm Apparatus, oi" which the ollowing is e speci "nunciator, will. he actuated to locate the signaling continuously, upon e maximum e. tempe uture' alarm apparatus whereby an Heime n.l emmer, or sr. reuze,

or ness neun,

To all whomz't may concern:

Be 1t known that HENRY R. Sumner, e citizen of the United States, residing at of Minnesota, have invented new and useicetion.

The ob]ect of my invention is to provide audible signal will be sounded upon zubehnornial rise or temperature.J whereby a vlsual signin, such tor instance es an enpoint of abnormal temperature.

One of the objects of my invention 1s to provide means for sounding or otherwise 'rise of temperature, and this feature of my invention embodies a device which will cause such continuous signal until it ils displaced or broken A further object of my inra'. is to provide means for setting the device an alarm' will be sounded up-on e of temperature to any predetermined e 1zent.

Other features of n." velty ci' my invention will be more fuly described in connection w'th the accompanying drawings, and will. 'he more particularly pointed out in und by the appended claims.

In the drawings: Figure l is a front elevation of my invention. Fig. 2 is u. side view thereof. Fig. 3 is view of e part of the apparatus shown in Fig. l, partly in elevation und partly in section. Fig'. 4 is a View in elevation of en adjustable Contact. Fig. 5 is another elevational view thereof. Fig. 6 is e sectional View on line 6-6 of l.

Like characters of references designate similar parts throughout the different iig` ures of the drawings.

- As illustrated, e base l is provided on which a thermometer 2 is mounted. Adjecent the thermometer 2 suitable gruduetions 3 are provided on the base l and a casing l is mounted on said-base end is connected with the upper end of the tube 52. A.' contactelement 5 is disposed in the casing 4 and is prmided with a shank 6 adapted to extend into'the tube 2. ln ceses where the interior cross section of the tube 2 is circular I flatten or otherwise mutilete one fece of the shank 6, as et 7, so as to provide u passage 8, between the shank and the inner Speeicaton of Letters e'tent,

Application led lebruaw lo, 1913.

of mercury e ieed of seid l0. l preferably provide u. ci; ing?, i neri :in interior cross section corresponding i the cross section of the head l k*weich c struction serves to prevent rotutire 'ino nient of the cont i ement with respect to the casing but which longitudinal movement with respe thereto.

Means is provided for e ij isting the contact clement and such means may comprise adjusting lll, adapted to engage the rack l0, and spindle l2 therefor rotzrtiveiy mounted in casing e. suitable bushing of insulation, designated :it 13, may serve as u hearing for the spindle l2 und the intter may he provided with e recessed heed whereby the spindie may be turned by screw dr' or like implement to adjust the position of the Contact element 5.

Neer the upper end of 'the zuoe 'Si pro ride e pocket l5 which is preferably tended downwardly .so es to form e trap for the mercury which overiows into. the pocket.

An audible signal i5 is provided, in "the form o'' s bell, and :i visuel signal El?, in form or' snnuncietor.

A circuit is provided i of current i8 fgom one n which e conductor i9 leeds to d. connected witi the contact element A portion of he conduelzor i9 is eoiied, 'ndiceted c1320, `to permit of up und down movement oir'Y the Contact element 5. .il suitable insulation 2li. serves ro insulate the conductor 19 from, the easing 4. A branch conductor 22 leeds to the pocket l5 and its terminal 23 tends thereinto in spaced relation with :i

includ o1. of

terminal of brunch conductor 25. The other pole or 'the source oi" current is conu nested by eonductor 26 with the bell i@ und therethrough hy conductor; 2'? to-tire nuncietor l?. From the ennunciutor l conductor 28, connected 'with ductoiV '35, hes its terminati Btl roi into the tube 2 et point slightly shove element 5, adjusted es rise of temperature the mercury would moveI upwardly past the shank of the contact element, in passage 8, into the pocket 15 Where it would close circuit through terminals 23 and 24 and branch kconductors 22 and 25, respectively, and thence through the circuit as hereinbefore describen This would cause a continuous sounding of the bell sig- 'nal until the base 1 was shipped'so as to ,cause tlie'mercury to How out of the pocket back into the tube 2 or until the pocket 15 4was broken to discharge the mercury there` I from.

. vVhile I have herein shown and described one specific embodiment of my invention, I do not wish to be limited thereto except for such limitations as the claims may import.

I claim 1. A temperature alarm apparatus comprising in combination, a thermometer, a contact element having a shank projecting into and closely fitting the interior of the tube of said thermometer and having a fiattened portion forming with said tube a restricted passage to permit rising of the mercury in said tube-,along said shank, said tube having apocket to permit overflow of the mercury therein, and a circuit includ ing a source of supply of current and a signal device withl one terminal of the circuit connected with said contact element and the other terminal disposed in the path of rise of the mercury in said tube, and branch conL ductors from said circuit having terminals disposed in spaced relation with respect tov 2. A temperature alarm apparatus com-- prising in combination, a thermometer, a contact element having a shank projecting into and closely tting the interior of the tube of said thermometer and having a flattened portion, forming in conjunction with said tube, a restricted passage to permit the rising of the mercury in said tube along said shank, an adjusting device, meansv carried by said shank for engaging said adjustingr device, whereby the projection of said shank inte said tube may he varied, a pocket in said tube to permit the overflow of the mercury into said pocket, a circuit including a source' of current supply and an indicating signal device, said circuit having one terminal connected withasaid contact element and the other terminal disposed in -the path of rise oi the mercury in said tube, branch conductors disposed in spaced relation with respect to each other in said pocket, said conductors being adapted to permanently close the circuit when the mercury rises to a predetermined point, and an audible signal device conncctcd in conjunction with the aioresaid indicating signal device.

In testimony whereof I afiix my signature in the presence of two witnesses.

HENRY R. SHIRLEY.

Vritnesses H. Il. BALDWIN, A. A. REN. 

